Patent GB-190213457-A (GB)
Title: Improvements in Double Seaming Machines for Sheet-metal Articles or Vessels such as Boxes and Cans
Inventor: STERNOFF-BEYER OTTO
Filed: 1902-06-13
Granted: 1903-04-16
Abstract: 13,457. Beyer, O. Sternoff-. June 13. Making cans and boxes.-Relates to machines for seaming sheet-metal vessels, such as boxes and cans, of irregular, non-circular, or circular form, means also being provided, when desired, for supplying the articles to the seaming-tools. The inward and outward movements of the seamer are performed through positively-acting gearing by means of which the seamer moves round a stationary chuck, the movements being obtained by cam and toothed gearing. Fig. 1 shows a side elevation of the machine, Fig. 2 a fragmentary section on the line 2-2, Fig. 1, Fig. 3 a plan of the intermittently-acting feeding-table, and Fig. 7 a plan of the underside of the revolving head D. The driving-shaft B rotates the spindle C to which the head D is secured. The head supports the pivoted contour carriers F and the seaming carriers G. At the same time that the contour carriers are rotated, each is rocked about its pivot by reason of a roller c engaging the groove H formed on the underside of the head D, the groove conforming to the contour of the seam to be made. The seam is formed against the chuck I. The spindle C which carries the head and its accessories is capable of vertical adjustment. Each seaming carrier G consists of an elbowlever upon wbich is mounted a pin for holding the seaming-roll E, the other arm g<1> being acted upon by mechanism which gives the carrier its gradual inward and outward movements. The mechanism consists of the arm g<1> connected by the link H<6> to a slowly-rotating crank i or equivalent device upon the rotary spindle K, which, passing through the stud d, is driven at its proper speed by difterential gearing. This gearing is made up preferably of the wheels L, L<1>, the latter, loose on the shaft, being fastened to the wheel M. The gear L drives the gear L' through intermediate pinions P, P<1> both fixed to the spindle Q. The wheel M, revolving backwards or forwards relatively to the head D and meshing with pinions K<1>, gives the shaft K their requisite slow rotation. In order that, while the seamer E is flattening the seam, the carrier G shall be uninfluenced by the outward and inward movements of the contour carrier, the shaft K is arranged so that its crank i comes concentric with the stud d around which the carrier F is swinging, the stud being bored out eccentrically for this purpose. To prolong the innermost position of the seamer in order that, finally, it may roll down or flatten the seam, a stop is provided to arrest the seaming- roll before the crank passes its dead centre and also a yielding connection which the crank compresses. The stop is formed of a pin k against which a part of the lever G abuts. The stop is rendered adjustable by means of a screw. The compressible connection is provided within the link h which, made of telescoping parts, contains a spring or rubber cushion adjustable by the plug l<1>. After the seam has been rolled down against the chuck, in order to force the finished article from the die, a spring behind the head r of the pad may be employed. To withdraw the finished article, the shaft Q carries at its lower end a worm Q<1> which drives the wheel R', shaft R, and cam S by means of which, and a roller t, the plunger T lifts a work-carrier U upon which the article to be seamed is placed and holds it against the chuck. To enable a high speed of manufacture to be attained, several carriers are brought into coincidence with the plunger beneath and the chuck above. These carriers are mounted above an intermittently-revolving table V, Fig. 3, which is operated by a Geneva-stop movement comprising a crank W and vertical shaft W<1> which is continuously rotated by mitre-gears, the stud of the crank successively entering radial notches V<2> in the table. The crank carries a mutilated disc w which enters recesses w<1> in the table to hold it stationary between its movements. A yielding take-up is introduced into the plunger which is made hollow and at its upper end fitted with a cushion pin the lower end of which rests upon a rubber plug. Various modifications within the scope of the invention may be introduced, for instance, the contour carrier may be placed upon the seaming carrier while the object to be seamed is retained stationary, the other parts revolving about it. When the machine is applied for the seaming of circular articles, the contour carrier is removed and an adjustable piece substituted upon which the seaming carrier is pivoted. The chuck is, of course, circular. In another modification, the contour carrier is retained and its free end fastened by a screw to an adjustable piece which has a slot and a fastening-screw whereby the outer end of the carrier may be set to a greater or less distance from the centre in order to accommodate any diameter of circular chuck.